US5163250A - Securing apparatus for tools - Google Patents

Securing apparatus for tools Download PDF

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Publication number
US5163250A
US5163250A US07/428,367 US42836789A US5163250A US 5163250 A US5163250 A US 5163250A US 42836789 A US42836789 A US 42836789A US 5163250 A US5163250 A US 5163250A
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US
United States
Prior art keywords
spindle
securing
tool
openings
axial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/428,367
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English (en)
Inventor
Rudolf Weber
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Michael Weinig AG
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Individual
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Filing date
Publication date
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Publication of US5163250A publication Critical patent/US5163250A/en
Assigned to MICHAEL WEINIG AKTIENSESELLSCHAFT reassignment MICHAEL WEINIG AKTIENSESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEBER, RUDOLF
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle
    • B27B5/325—Devices for securing circular saw blades to the saw spindle using fluid pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors

Definitions

  • the present invention relates to a clamping or securing apparatus for tools, especially for grinding wheels, and includes a rotatably driven spindle and a hydraulically expandable clamping or securing member, which is provided for securing a tool on the spindle and is provided with at least one hydraulic medium chamber.
  • the tool itself is provided with the securing member.
  • the hydraulic medium must be placed under pressure so that the securing member will expand resiliently.
  • the tool is radially secured upon the spindle, and is hereby also radially centered.
  • the latter is pressed onto the securing sleeve until an abutment on the securing apparatus is reached.
  • FIG. 1 is an axial cross-sectional view through one exemplary embodiment of the inventive securing apparatus.
  • FIG. 2 is an end view of the securing apparatus of FIG. 1.
  • the securing apparatus of the present invention is characterized primarily in that: the securing member is a securing hub or sleeve that is provided on the spindle, with the at least one hydraulic medium chamber communicating with a first bore that extends through the spindle and is provided for supplying hydraulic medium; the spindle is provided with a tightening screw that can selectively close off the first bore and can be backed off into a pressure release position; and at least one axial securing element is provided that is disposed on the securing apparatus in such a way as to be axially displaceable and is adapted to be positively connected with the tool in the axial direction.
  • the resiliently expandable securing member is no longer a part of the tool, but rather is provided on the spindle.
  • the tools can therefore have a simple and straightforward construction.
  • conventional tools can now also be hydraulically secured. If with the inventive securing apparatus a tool is to be removed, then it is merely necessary to back the tightening screw off into its pressure relief position. The tool can then be removed from the securing sleeve without difficulty. If a tool is to be clamped or secured, it is then merely necessary to screw the securing or tightening screw out of the pressure relief position and back into its securing position. In so doing, the pressure medium in the bore of the spindle is brought to the desired securing pressure.
  • the tools can be removed and secured very quickly, and above all these processes can be undertaken in a very simple manner.
  • the tool is additionally axially fixed and secured for its radial centering and securing via the securing sleeve.
  • the axial securing element is positively connected with the tool in the axial direction, so that during axial displacement of the axial securing element, the tool is then shifted in the axial direction and can, for example, be pulled or tightened against an abutment surface.
  • This enables a satisfactory positioning of the tool in the securing apparatus not only in a radial direction but also in an axial direction.
  • the tool is therefore seated on the spindle, i.e. the securing sleeve thereof, in a precisely aligned manner.
  • the securing apparatus serves to secure tools, especially grinding wheels.
  • the securing apparatus is provided on a machine and has a housing 1 in which a spindle 2 is rotatably mounted via antifriction bearings 3, 4.
  • the spindle 2 projects out of the housing 1 and carries on its free end a clamping or securing hub or sleeve 5, which is embodied as a hydraulic sleeve and is provided with one or more chambers 6 that are closed-off axially.
  • the chamber 6 Radially inwardly, the chamber 6 is delimited by the spindle 2, and radially outwardly the chamber 6 is delimited by a resiliently deformable wall portion 7 of the securing sleeve 5.
  • At least one transverse bore 8 that extends through the spindle 2 opens out into the chamber 6; the transverse bore or bores 8 establish communication between the chamber 6 and a bore 9 that extends centrally and axially through the spindle 2.
  • the securing sleeve 5 is mounted on the free end of the spindle 2.
  • the bore 9 is closed off by a filling valve 10 via which a pressure medium is introduced into the bore 9.
  • the bore 9 is closed off by a tightening screw 11 that is screwed into a threaded bore 12 of the spindle 2, with the end of the threaded bore 12 being open.
  • a clamping or securing piston 13 Disposed in the bore 9 is a clamping or securing piston 13, with the end face of the piston 13, under the pressure of the pressure medium in the bore 9, resting against the tightening screw 11 (FIG. 1).
  • the securing piston 13 is guided in the bore 9 in a sealed manner, so that the pressure medium cannot escape to the outside between the securing piston and the wall of the bore 9.
  • the spindle 2 in the region beyond the housing 1, is provided with a collar 14 that has an enlarged outer diameter and that has the external thread 15. Screwed onto the collar 14 is a centrifugal ring 16 that is provided on that side thereof that faces the securing sleeve 5 with a recess 17 that is on the end and is disposed coaxial to the spindle 2.
  • the recess 17 is provided with an internal thread 18, and a ring 19 can be screwed into this recess 17.
  • the centrifugal ring 16 On that side opposite the recess 17, the centrifugal ring 16 is provided with two coaxial, annular recessed portions 20 and 21 into which the housing 1 extends, with play, via appropriate annular ribs 22 and 23 that are similarly disposed coaxial to the spindle 2.
  • the centrifugal ring 16 diametrically across from one another, are two stop means 24 and 25 that are preferably embodied as setscrews.
  • the stop means 24, 25 extend into the annular recess 17 of the centrifugal ring 16 (FIG. 1). If the stop means 24, 25 are embodied as screws, they can be easily disposed in the centrifugal ring 16 in such a way that they do not extend out of the recess 17.
  • Each of the stop means 24 and 25 of the centrifugal ring 16 extends into an elongated opening 26 and 27 that is provided in the ring 19 and is curved in the shape of part of a circle (FIG. 2).
  • Each of the openings 26, 27 has the same length, and these openings are disposed diametrically across from one another.
  • the ring 19 is provided with two keyhole-like openings 28 and 29 that are disposed diametrically across from one another (FIG. 2). These openings 28, 29 serve to receive screws 30, 31 that are provided on a holder 32 for the tool 33 that is to be secured.
  • the openings 28, 29 of the ring 19 are disposed halfway between the openings 26 and 27.
  • the larger portion of the opening 28 faces the opening 27, and the larger portion of the opening 29 faces the opening 26.
  • pressure medium is introduced into the bore 9 via the filling valve 10.
  • the pressure medium is preferably grease that is introduced via a grease gun.
  • a securing pressure of, for example, approximately 300 to 500 bar is nonrecurrently produced.
  • the pressure medium arrives into the chamber or chambers 6, as a result of which the wall portion 7 of the securing sleeve 5 is resiliently deformed in a radially outward direction.
  • the holder 32 that is seated on the securing sleeve 5 and is provided with the tool 33 is centered and radially secured on the securing sleeve. If the tool and holder are to be removed, it is merely necessary to loosen the tightening screw 11, which results in a shifting of the securing piston 13 in the bore under the securing pressure.
  • the pressure medium is relieved and the deformation of the wall portion 7 of the securing sleeve 5 is reduced or eliminated, so that the tool 33 along with the holder 32 can be easily removed.
  • the tightening screw 11 is then merely screwed back into the threaded bore 12 until the head 34 of the tightening screw rests against the planar end face 35 of the spindle 2.
  • the securing piston 13 is again moved back in the bore 9, thereby again resulting in the initially set securing pressure. It is no longer necessary to reduce the securing pressure via the filling valve 10 every time that an exchange of the tool is undertaken. Rather, this securing pressure is set only during filling with the pressure medium; all further securing processes are then effected merely by screwing the tightening screw 11 in or out in the manner described.
  • a screw plug 36 that can be reached from the end and that is open during the initial filling with pressure medium to thereby enable a venting during the filling.
  • the screw plug 36 is subsequently screwed back into the closed position illustrated in FIG. 1.
  • the axial fixation of the tool 33 is effected by the two screws 30 and 31 in the holder 32, with these screws also serving to positively keep the tool 33 from twisting.
  • the tool 33, along with the holder 32, are placed upon the securing sleeve 5 in such a way that the screws 30, 31 pass through the larger portions of the keyhole-like openings 28, 29 in the ring 19.
  • the tool 33 is subsequently turned counter to the direction of rotation during operation, whereby the shafts of the screws 30, 31 pass into the narrower portions of the keyhole-like openings 28, 29.
  • the heads of the screws then rest against the back side 37 of the ring 19.
  • the ring 19 is screwed into the recess 17 of the centrifugal ring 16 in such a way that during rotation of the ring 19 as the tool 32, 33 is being secured, there is in every case assured that the tool will also come to rest against the end face 38 of the centrifugal ring 16.
  • the stop means 24, 25, which are embodied as setscrews, are not screwed into the centrifugal ring 16 until the ring 19 assumes its installed position. In so doing, the ring 19 is screwed into the centrifugal ring 16 to such an extent that the elongated openings 26, 27 of the ring 19 are disposed in the region of the threaded bores that are provided for receiving the stop means 24, 25.
  • the openings 26, 27 are of such a length, and the stop means 24, 25 are disposed within the openings in such a way, that when the tool 32, 33 is installed, the ring 19 can in each case be turned to such an extent that the tool comes to rest against the end face 38 of the centrifugal ring 16.
  • the screws 30, 31 can be set precisely axially in the holder 32 in such a way that the distance of the screw head from the adjacent side face 39 of the holder 32 corresponds to the thickness of the ring 19 plus a slight overmeasure for introduction purposes. After rotation of the ring 19 on the thread 18, the tool 32, 33 cannot be axially shifted relative to the ring 19 in the installed position.
  • the tool 32, 33 and the ring 19 are backed off or rotated back to such an extent that the stop means 24, 25 come to rest against the appropriate edge of the elongated openings 26, 27 in the ring 19.
  • the tool can then be removed, with the heads of the screws 30, 31 being adapted to be withdrawn through the larger portions of the keyhole-like openings 28, 29 in the ring 19.
  • the ring 19 axially positions the tool 32, 33 in the manner described. Since during rotation the ring 19 is screwed into the centrifugal ring 16, the tool 32, 33 is shifted in the axial direction, so that when the tool rests against the end face 38 of the centrifugal ring 16, an engagement force that acts in the axial direction is also produced.
  • the ring 19 prevents the tool 32, 33 from being slid from the spindle 2. Since the tool 32, 33 is turned counter to the direction of rotation during operation, if a drop in hydraulic pressure occurred the ring 19 would be screwed still further into the centrifugal ring 16 counter to the direction of rotation during operation. In this way, the tool 32, 33 cannot be unintentionally slid from the spindle 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Gripping On Spindles (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Clamps And Clips (AREA)
US07/428,367 1988-10-28 1989-10-27 Securing apparatus for tools Expired - Fee Related US5163250A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8813580U DE8813580U1 (de) 1988-10-28 1988-10-28 Spannvorrichtung für Werkzeuge, insbesondere für Schleifscheiben
DE8813580[U] 1988-10-28

Publications (1)

Publication Number Publication Date
US5163250A true US5163250A (en) 1992-11-17

Family

ID=6829379

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/428,367 Expired - Fee Related US5163250A (en) 1988-10-28 1989-10-27 Securing apparatus for tools

Country Status (5)

Country Link
US (1) US5163250A (fr)
EP (1) EP0366105B1 (fr)
JP (1) JPH02237765A (fr)
AT (1) ATE92825T1 (fr)
DE (2) DE8813580U1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5558571A (en) * 1993-09-03 1996-09-24 Hitachi Koki Company Limited Portable grinder
US20040063389A1 (en) * 2000-12-22 2004-04-01 Fritz Kotting Arrangement for detachably securing a grinding wheel or a group of grinding wheels on a wheel spindle
US20060172669A1 (en) * 2003-12-30 2006-08-03 Juergen Hesse Hand machine tool with clamping device
US20150122100A1 (en) * 2012-04-30 2015-05-07 Gea Food Solutions Germany Gmbh Cutting blade comprising a securing cavity
US20200316751A1 (en) * 2019-04-05 2020-10-08 Honda Motor Co., Ltd. Systems and methods of processing a rotatable assembly
IT202000017344A1 (it) * 2020-07-16 2022-01-16 Scm Group Spa Gruppo operativo per una macchina utensile e macchina utensile comprendente tale gruppo operativo.
CN115139225A (zh) * 2022-09-01 2022-10-04 昆明尼古拉斯克雷亚机床有限公司 一种龙门式加工中心磨削用主轴动力控制装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113319601B (zh) * 2021-06-01 2022-12-23 广东艾普升智能装备有限公司 一种便于更换刀具的数控机床
CH720303A1 (de) * 2022-12-07 2024-06-14 Reishauer Ag Vorrichtung zum Schleifen eines Werkstücks und/oder Abrichten eines Werkzeugs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US519892A (en) * 1894-05-15 Clamp for circular saws
US2616230A (en) * 1950-07-11 1952-11-04 Allison Company Abrasive cutoff wheel
US3130978A (en) * 1961-07-31 1964-04-28 Ingersoll Milling Machine Co Expansible mandrel
US4677792A (en) * 1985-04-04 1987-07-07 Montanwerke Walter Gmbh Clamping or chucking system for a grinding wheel or disk

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1062567B (de) * 1958-02-11 1959-07-30 Diskus Werke Frankfurt Main Ag Spannvorrichtung zur loesbaren Befestigung von Schleifkoerpern an ihrer Tragscheibe
DE1300777B (de) * 1965-03-03 1969-08-07 Wilhelm Koenig Mechanische Wer Hydraulischer Spanndorn
DE2937168A1 (de) * 1979-09-14 1981-04-02 BBT-Holding AG, Bösingen Anschlussvorrichtung zum anschluss eines werkzeugs an eine rotierend antreibbare spindel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US519892A (en) * 1894-05-15 Clamp for circular saws
US2616230A (en) * 1950-07-11 1952-11-04 Allison Company Abrasive cutoff wheel
US3130978A (en) * 1961-07-31 1964-04-28 Ingersoll Milling Machine Co Expansible mandrel
US4677792A (en) * 1985-04-04 1987-07-07 Montanwerke Walter Gmbh Clamping or chucking system for a grinding wheel or disk

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5558571A (en) * 1993-09-03 1996-09-24 Hitachi Koki Company Limited Portable grinder
US20040063389A1 (en) * 2000-12-22 2004-04-01 Fritz Kotting Arrangement for detachably securing a grinding wheel or a group of grinding wheels on a wheel spindle
US6966824B2 (en) * 2000-12-22 2005-11-22 Weco Optik Gmbh Arrangement for detachably securing a grinding wheel or a group of grinding wheels on a wheel spindle
US20060172669A1 (en) * 2003-12-30 2006-08-03 Juergen Hesse Hand machine tool with clamping device
US7207873B2 (en) * 2003-12-30 2007-04-24 Robert Bosch Gmbh Hand machine tool with clamping device
US20150122100A1 (en) * 2012-04-30 2015-05-07 Gea Food Solutions Germany Gmbh Cutting blade comprising a securing cavity
US20200316751A1 (en) * 2019-04-05 2020-10-08 Honda Motor Co., Ltd. Systems and methods of processing a rotatable assembly
US11577365B2 (en) * 2019-04-05 2023-02-14 Honda Motor Co., Ltd. Systems and methods of processing a rotatable assembly
IT202000017344A1 (it) * 2020-07-16 2022-01-16 Scm Group Spa Gruppo operativo per una macchina utensile e macchina utensile comprendente tale gruppo operativo.
EP3939743A1 (fr) * 2020-07-16 2022-01-19 SCM Group S.p.A. Ensemble operationnel pour une machine-outil et machine-outil comprenant un tel ensemble operationnel
CN115139225A (zh) * 2022-09-01 2022-10-04 昆明尼古拉斯克雷亚机床有限公司 一种龙门式加工中心磨削用主轴动力控制装置

Also Published As

Publication number Publication date
EP0366105A2 (fr) 1990-05-02
ATE92825T1 (de) 1993-08-15
JPH02237765A (ja) 1990-09-20
DE58905251D1 (de) 1993-09-16
EP0366105A3 (fr) 1991-03-13
DE8813580U1 (de) 1989-01-05
EP0366105B1 (fr) 1993-08-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MICHAEL WEINIG AKTIENSESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WEBER, RUDOLF;REEL/FRAME:007249/0282

Effective date: 19940805

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19961120

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362